It is really amazing and I would recommend a visit if you are in the ‘area’. I went there on a ‘day-trip’ while visiting Beijing. It took about 1-1.5hrs to get to this specific part of the wall. You can visit different parts of it and each ‘stretch’ is very very long and will give you a pretty good ‘feel’ of the length of the whole thing. It is very steep (more then you imagine maybe!) and it is a fun, though not easy, climb. Views are amazing if you’re there on a nice clear day.